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Finding the Fourth Proportional to 261,390.72, 392,086.08 and 64,398.72

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Solution

The fourth proportional to 261,390.72, 392,086.08 and 64,398.72 is: 96,598.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,390.72 : 392,086.08 = 64,398.72 : x
  2. Step 2: Convert to fraction form
    261,390.72/392,086.08 = 64,398.72/x
  3. Step 3: Cross multiply
    261,390.72x = 392,086.08 × 64,398.72
  4. Step 4: Simplify right side
    261,390.72x = 25,249,841,681.82
  5. Step 5: Solve for x
    x = 25,249,841,681.82/261,390.72
  6. Step 6: Final answer
    x = 96,598.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.