Home / 720,465,441.30-994,243,159.26-390,440,580.30

Finding the Fourth Proportional to 720,465,441.30, 994,243,159.26 and 390,440,580.30

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Solution

The fourth proportional to 720,465,441.30, 994,243,159.26 and 390,440,580.30 is: 538,808,461.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,465,441.30 : 994,243,159.26 = 390,440,580.30 : x
  2. Step 2: Convert to fraction form
    720,465,441.30/994,243,159.26 = 390,440,580.30/x
  3. Step 3: Cross multiply
    720,465,441.30x = 994,243,159.26 × 390,440,580.30
  4. Step 4: Simplify right side
    720,465,441.30x = 388,192,876,060,779,712
  5. Step 5: Solve for x
    x = 388,192,876,060,779,712/720,465,441.30
  6. Step 6: Final answer
    x = 538,808,461.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.