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Finding the Fourth Proportional to 280,666.71, 387,315.54 and 153,339.57

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Solution

The fourth proportional to 280,666.71, 387,315.54 and 153,339.57 is: 211,606.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,666.71 : 387,315.54 = 153,339.57 : x
  2. Step 2: Convert to fraction form
    280,666.71/387,315.54 = 153,339.57/x
  3. Step 3: Cross multiply
    280,666.71x = 387,315.54 × 153,339.57
  4. Step 4: Simplify right side
    280,666.71x = 59,390,798,357.92
  5. Step 5: Solve for x
    x = 59,390,798,357.92/280,666.71
  6. Step 6: Final answer
    x = 211,606.14

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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.