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Finding the Fourth Proportional to 355,702.78, 533,555.08 and 145,340.72

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Solution

The fourth proportional to 355,702.78, 533,555.08 and 145,340.72 is: 218,011.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,702.78 : 533,555.08 = 145,340.72 : x
  2. Step 2: Convert to fraction form
    355,702.78/533,555.08 = 145,340.72/x
  3. Step 3: Cross multiply
    355,702.78x = 533,555.08 × 145,340.72
  4. Step 4: Simplify right side
    355,702.78x = 77,547,279,486.86
  5. Step 5: Solve for x
    x = 77,547,279,486.86/355,702.78
  6. Step 6: Final answer
    x = 218,011.45

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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.