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Finding the Fourth Proportional to 521,897.04, 720,359.64 and 307,106.16

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Solution

The fourth proportional to 521,897.04, 720,359.64 and 307,106.16 is: 423,889.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,897.04 : 720,359.64 = 307,106.16 : x
  2. Step 2: Convert to fraction form
    521,897.04/720,359.64 = 307,106.16/x
  3. Step 3: Cross multiply
    521,897.04x = 720,359.64 × 307,106.16
  4. Step 4: Simplify right side
    521,897.04x = 221,226,882,859.38
  5. Step 5: Solve for x
    x = 221,226,882,859.38/521,897.04
  6. Step 6: Final answer
    x = 423,889.90

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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.