Home / 989,985.78-1,484,740.62-456,994.80

Finding the Fourth Proportional to 989,985.78, 1,484,740.62 and 456,994.80

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Solution

The fourth proportional to 989,985.78, 1,484,740.62 and 456,994.80 is: 685,382.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,985.78 : 1,484,740.62 = 456,994.80 : x
  2. Step 2: Convert to fraction form
    989,985.78/1,484,740.62 = 456,994.80/x
  3. Step 3: Cross multiply
    989,985.78x = 1,484,740.62 × 456,994.80
  4. Step 4: Simplify right side
    989,985.78x = 678,518,742,688.78
  5. Step 5: Solve for x
    x = 678,518,742,688.78/989,985.78
  6. Step 6: Final answer
    x = 685,382.31

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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.