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Finding the Fourth Proportional to 712,700.32, 983,526.63 and 390,421.87

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Solution

The fourth proportional to 712,700.32, 983,526.63 and 390,421.87 is: 538,782.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,700.32 : 983,526.63 = 390,421.87 : x
  2. Step 2: Convert to fraction form
    712,700.32/983,526.63 = 390,421.87/x
  3. Step 3: Cross multiply
    712,700.32x = 983,526.63 × 390,421.87
  4. Step 4: Simplify right side
    712,700.32x = 383,990,306,079.40
  5. Step 5: Solve for x
    x = 383,990,306,079.40/712,700.32
  6. Step 6: Final answer
    x = 538,782.28

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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.