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Finding the Fourth Proportional to 612,345.60, 918,518.40 and 583,315.20

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Solution

The fourth proportional to 612,345.60, 918,518.40 and 583,315.20 is: 874,972.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,345.60 : 918,518.40 = 583,315.20 : x
  2. Step 2: Convert to fraction form
    612,345.60/918,518.40 = 583,315.20/x
  3. Step 3: Cross multiply
    612,345.60x = 918,518.40 × 583,315.20
  4. Step 4: Simplify right side
    612,345.60x = 535,785,744,199.68
  5. Step 5: Solve for x
    x = 535,785,744,199.68/612,345.60
  6. Step 6: Final answer
    x = 874,972.80

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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.