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Finding the Fourth Proportional to 638,152.40, 956,353.80 and 520,054.40

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Solution

The fourth proportional to 638,152.40, 956,353.80 and 520,054.40 is: 779,368.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,152.40 : 956,353.80 = 520,054.40 : x
  2. Step 2: Convert to fraction form
    638,152.40/956,353.80 = 520,054.40/x
  3. Step 3: Cross multiply
    638,152.40x = 956,353.80 × 520,054.40
  4. Step 4: Simplify right side
    638,152.40x = 497,356,001,646.72
  5. Step 5: Solve for x
    x = 497,356,001,646.72/638,152.40
  6. Step 6: Final answer
    x = 779,368.69

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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.