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Finding the Fourth Proportional to 645,323.95, 890,510.49 and 358,837.89

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Solution

The fourth proportional to 645,323.95, 890,510.49 and 358,837.89 is: 495,175.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,323.95 : 890,510.49 = 358,837.89 : x
  2. Step 2: Convert to fraction form
    645,323.95/890,510.49 = 358,837.89/x
  3. Step 3: Cross multiply
    645,323.95x = 890,510.49 × 358,837.89
  4. Step 4: Simplify right side
    645,323.95x = 319,548,905,254.47
  5. Step 5: Solve for x
    x = 319,548,905,254.47/645,323.95
  6. Step 6: Final answer
    x = 495,175.96

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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.