Home / 720,465,554.16-994,243,314.69-390,440,693.16

Finding the Fourth Proportional to 720,465,554.16, 994,243,314.69 and 390,440,693.16

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Solution

The fourth proportional to 720,465,554.16, 994,243,314.69 and 390,440,693.16 is: 538,808,617.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,465,554.16 : 994,243,314.69 = 390,440,693.16 : x
  2. Step 2: Convert to fraction form
    720,465,554.16/994,243,314.69 = 390,440,693.16/x
  3. Step 3: Cross multiply
    720,465,554.16x = 994,243,314.69 × 390,440,693.16
  4. Step 4: Simplify right side
    720,465,554.16x = 388,193,048,957,259,648
  5. Step 5: Solve for x
    x = 388,193,048,957,259,648/720,465,554.16
  6. Step 6: Final answer
    x = 538,808,617.17

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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.