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Finding the Fourth Proportional to 553,783.90, 830,675.85 and 316,931.80

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Solution

The fourth proportional to 553,783.90, 830,675.85 and 316,931.80 is: 475,397.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,783.90 : 830,675.85 = 316,931.80 : x
  2. Step 2: Convert to fraction form
    553,783.90/830,675.85 = 316,931.80/x
  3. Step 3: Cross multiply
    553,783.90x = 830,675.85 × 316,931.80
  4. Step 4: Simplify right side
    553,783.90x = 263,267,592,357.03
  5. Step 5: Solve for x
    x = 263,267,592,357.03/553,783.90
  6. Step 6: Final answer
    x = 475,397.70

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Similar ratio
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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.